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Access-Control List (ACL) ○꠹

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Access-Control List (ACL) ○꠹｜Definition｜1st｜20261013192254-00-⌔

Access-control list - Wikipedia

Access-control list

In computer security, an access-control list (ACL) is a list of permissions1 associated with a system resource (object or facility). An ACL specifies which users or system processes are granted access to resources, as well as what operations are allowed on given resources.2 Each entry in a typical ACL specifies a subject and an operation. For instance,

  • If a file object has an ACL that contains (Alice: read,write; Bob: read), this would give Alice permission to read and write the file and give Bob permission only to read it.
  • If the Resource Access Control Facility (RACF) profile CONSOLE CLASS(TSOAUTH) has an ACL that contains (ALICE:READ), this would give ALICE permission to use the TSO CONSOLE command.

Printed 2026-10-13.

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Footnotes

  1. E.g., File-system permissions, permission to perform specific action. ↩

  2. R. Shirey (August 2007). Internet Security Glossary, Version 2. IETF. doi:10.17487/RFC4949. RFC 4949. Retrieved May 19, 2023. ↩

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